An interlock system using biometrics scans to identify in real-time an individual who seeks to operate a mechanical device, such as an automobile. Biometrics features that uniquely identify an individual are selected. If a real-time biometrics scan of the individual does not match a stored image of an authorized operator, the interlock system will lock the mechanical device to prevent operation. The interlock system may be used in conjunction with a breath alcohol analyzer to determine impairment. If the biometrics testing indicates that the individual is required to be tested for impairment, the mechanical device will not operate until the testing is completed. If the biometrics testing automatically indicates that the operator of the mechanical apparatus and the individual exhaling into the breath alcohol analyzer component of the ignition interlock is not the same person, the ignition system of the mechanical apparatus, which operates in conjunction with the ignition interlock of the present invention, provides a programmable software option to prevent the apparatus from starting. If the test indicates that the individual is impaired the interlock system will lock the mechanical device to prevent operation.